Improvement in bolt-heading machines



Urrea CHAS. KANE AND JAMES KANE,

trice.

OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN BOLT-HEADING MACHINES.

To all whom it 'may concern Be it known that we, CHARLES KANE and JAMESKANE, of the city of Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and Improved Bolt- Press 5 and we dohereby declare that the following is a full and exact descriptionthereof, which will enable others skilled in the art to make and use ourinvention, reference being had to the accompanying drawings, and to theletters of reference marked thereon.

Figure l is a view, in perspective, ofthe part of the press showing therelative position of the dies. Fig. 2 is afront View of the pressingdies when shut. Fig. 3 is a front view of the griping-dies when open,showing the pressingdies behind. Fig. 4 is the same view as Fig. 3, withthe dies shut; and Figs. 5, 6, 7, 8, 9, and l() are sectional viewsthrough the line A B, showing the position of the dies and the shapethat the heated iron assumes (hiring the process of manufacture of thebolt.

The nature of our invention consists in a press for pressing bolts, inwhich the dies for pressing have their pressing-surface formed by aplane surface at right angles with the cenl ter of motion of saidpressing-dies, and have a ledge, shelf, or projection having its sidesformed by plane surfaces parallel to and at right angles with thepressingsurface, so that when the two pressing-dies are brought incontact or closed they leave between them a space having aparallelogrammic form.

Our invention furthermore consistsrin providing said press with twocutters placed under the gripiug-dies, for the purpose of cutting a boltoff from the baar, as hereinafter described.

G is the bed-plate. D is the stationary head. E is the movable head. Fis the 'staving and heading movable head. G is the stationarygriping-die. H is the movable griping-die. I is the stationarypressing-die. K is the movable pressing-die. la and i are the shelves orprojections on the pressing-dies. L is the staving and heading die, ofordinary construction. M and N are the cutters and pointers. 0 0 O arethe clamps to secure the dies, and P P P P, vc., are set-screws toregulate the position of the dies and cutters in the ordinary manner.

llhe press can be made of any desired shape or mode of construction. Theheads E and F can be moved by levers, cams, cccentrics, or be acted onby a ram or drop in any of the modes in use.

Operations: rIhe dies beingl open, as in Figs. 3 and 5, a bar of iron ofthe proper size, and heated at and near the end, is placed between thegriping-dies, as in Fig. 5. It is griped by the dies H and G, and thedie L coming forward, it is staved in the way represented in Fig. 6. Itwill be observed that when the pressing-dies K and I are closed, Fig. 2,they leave between them a space` which has the sha-pe of aparallelogram, with its small side equal to the diameter of the roundbar of iron worked, so that when the staving operation is going on themetal is shaped into flat surfaces against the two surfaces S and T,staving it perfectly in the center of said bar and forcing the excess ofmetal upward and downward. The dies open and the heated iron is turnedone-quarter of a turn, when the griping-dies and pressing-dies againclose, drawing the metal, as represented in Fig. 7. The square neck U ofthe bolt is now almost perfect. As the part VV of the metal, beingpartly chilled by its former contact with the pressing-dies I and K,will hardly expand in the spaces X X, and the part Z Z being now next tothe surfaces T and S ofthe pressing-dies, they will by coming togetherpress that part to the proper shape. The excess of metal will be forcedin a longitudinal direction, and, as it is termed, it is drawned ordrawed,77 pushing the head in Y and the bolt in the direction of thearrow, (see Fig. 7,) making the square perfect. The header now comesagain forward, and its pressure is so great that the metal is againcrushed a little in the places X X, Fig. 8; but the bar is again turnedone-quarter round, as in Fig. 9, and when the pressing-dies have gripedit and the heading-die L staved it once more the boltis perfect inshape. (Fig. l0.) It is next transferred to the cutters, which, by meansof a guide where the head of the bolt touches, will cut and point thebolt of the exact len and this finishes the operation.

Of course we can make bolts by cutting the bar first, and in that casewill place the heated gth:

piece of iron in the griping-dies, where it will undergoall theoperations We have described except the cutting.

What We claim, and desire to secure by Letters Patent ofthe UnitedStates, is-

l./ The dies I and K, having their pressingsur'ace at right angles withthe center of their motion, and havingprojectingledges or shelves rtand7c 7c, so that when the dies come together they leave between them aparallelopipedic space7 the dimension of which is greater in a directionperpendicular to the line of motion of the dies.

2. Tire cutters M and N, in combination with the pressing-dies I and K,arranged in the manner and for the purpose specified.

CHARLES KANE. [L. s] JAMES KANE. [L s.] Witnesses:

H. P. GENGEMBRE, J. DONALDSON.

